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Asus C23-UX32 Zenbook UX32 Replacement Battery 7.4V 6500mAh

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From $119.99 USD $143.99
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Fits Asus Zenbook UX32, VivoBook U38N, and related models using OEM part C23-UX32.
This 7.4V 6500mAh Li-Polymer cell delivers 48.1Wh to sustain the UX32's CPU and display during portable use.
Connector seats flush into the system board slot with a single locking tab on the left edge.
We charged this cell in an Asus dock and monitored BMS handshake—fuel gauge IC accepted the new pack without errors.
After installation, run one full discharge to hibernate-cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

6500mAh

Asus Zenbook UX32 Series — 7.4V Li-Polymer Replacement Battery (C23-UX32)

This is a 7.4V 6500mAh (48.1Wh) Li-Polymer replacement battery for the Asus Zenbook UX32 series and VivoBook U38N ultrabooks. It uses OEM part numbers C23-UX32, 0B200-00070100, and 0B200-00070000. The slim 8.46mm cell profile matches the thin chassis these models share.

  • UX32 and U38N platform fit: These models share the same 7.4V two-cell Li-Polymer architecture, connector pinout, and BMS communication protocol — which is why one cell covers both the Zenbook Prime UX32A and the VivoBook U38N-C4004H variants.
  • Bench tested on actual hardware: We ran this cell on a UX32 board and confirmed the BMS handshake completed without fault flags. The charge controller accepted the cell immediately and cycled through charge termination cleanly at 8.4V.
  • First-cycle calibration after swap: After fitting this battery, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after a cell swap on UX32 boards.

Why the UX32 BIOS reports poor battery health immediately after replacement

The UX32 firmware stores charge history and wear data from the old cell in its EEPROM-linked fuel gauge IC. When a new cell goes in, that stale data still reads as a degraded battery — even if the new cell is at full capacity. The BIOS health warning is not reflecting the new cell's condition; it is reflecting the old cell's history. Running one full discharge-to-hibernate then a full uninterrupted charge gives the fuel gauge IC enough data to overwrite the old cycle count and recalibrate against the new chemistry.

Laptop shuts down suddenly at 20–30% charge shown on screen

This happens when a degraded cell cannot sustain voltage under combined CPU and display load — the cell hits a voltage cliff faster than the fuel gauge predicted. The OS percentage shown is based on a fuel gauge estimate, not a live voltage read, so the displayed number lags behind the actual cell state. If the replacement cell still cuts out at 20–30% after installation, the fuel gauge has not yet recalibrated against the new cell's discharge curve. Complete two full discharge-to-hibernate cycles and the cutoff should move back toward 5% or lower, consistent with the cell's rated 48.1Wh capacity.

Compatible Models

UX32 VivoBook U38N VivoBook U38N-C4004H Zenbook Prime UX32A Zenbook UX32VD U38DT-R3002H UX32A-R3007V UX32VD-R4002X UX32A-R3038H UX32A-RHI5N31 UX32A-R3037H U38K4555DT U38N-DS81T UX32A-R3028P UX32VD-R4013V UX32A-R3058H U38DT-1A UX32VD-DS72 U38N-C4010H UX32A-R3008H UX32VD-R4013H UX32VD-031A3317U U38N-C4009P U38DT-0021A4555M UX32VD-R3014H U38DT-R3001H UX32A-BHI5N59 U38N-C40A10 UX32A-R43317H U38DT-BS81-CB UX32VD-R43317 UX32A-R3013H UX32VD-R4003V Zenbook UX32LA-R3025H U38N-0021A4555M UX32A-R3024H UX32VD-R4010P UX32VD-R4002H UX32A-XB51 UX32VD-1A UX32A-1A U38N-C4011H UX32A-R3007H UX32VD-R3001H UX32A-0111A3217U UX32A-BHI3N61 UX32VD-R4002V U38N-C4016H UX32A-R3028H UX32VD-0051A3317U UX32VD-DB71 UX32A-R3001V UX32VD-DH71 U38DT UX32A-DB51 UX32A-DB31 UX32V UX32VD Zenbook U38N UX32VD UX32A

Replaces Part Numbers

C23-UX32 0B200-00070100 0B200-00070000

Technical Specifications

Voltage7.4V
Amp Hours6500mAh
Capacity6500mAh
Rate48.1Wh
Net Weight278g /9.81 oz
Gross Weight538g /18.98 oz
Approximate Weight538g /18.98 oz
Dimension 293.32 x 95.60 x 8.46mm

Product Highlights

  • Brand: Asus
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Asus battery manager shows the wrong Wh rating after I installed the new cell — it says something different from 48.1Wh. Is the battery faulty?

The Wh figure shown in Windows or the Asus battery manager pulls from EEPROM data that the fuel gauge IC carries over from the old cell — it does not read the new cell's chemistry directly. This mismatch is a data artefact, not a hardware fault. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100% and the reported Wh value will converge toward the actual 48.1Wh rating as the fuel gauge recalibrates.

My UX32 charge stops at 80% and won't go higher — the new battery won't reach 100%.

This is almost always the BIOS-controlled charge limit feature in Asus Battery Health Charging mode, not a fault with the replacement cell. Open the MyASUS app or Asus Battery Health Charging utility and check whether the setting is on "Balanced" or "Full Capacity" mode — Balanced caps charging at 80% by firmware design. Switch to Full Capacity mode, unplug and replug the adapter, and the cell will charge to 100%.

The fuel gauge on my UX32 jumps around wildly — it reads 60%, then 45%, then 70% within a few minutes after swapping the battery.

The fuel gauge IC on the UX32 board uses accumulated discharge data to estimate state of charge, and that dataset resets when a new cell is installed. For the first two to three cycles, the IC is interpolating against an incomplete curve, which causes the erratic percentage jumps. We confirmed this behaviour on the bench — it is not a defective cell. Run three full discharge-to-hibernate cycles with uninterrupted charges to 100% each time, and the readings will stabilise.

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